# -*-  coding:utf-8 -*- 
# Author : lihongliang


import  xml.etree.ElementTree as ET

tree = ET.parse("xmltest.xml")
root = tree.getroot()

# #修改
# for node in root.iter("year"):
#     new_year = int(node.text) +1
#     node.text = str(new_year)
#     node.set("attr_test","yes")
#
# tree.write("xmltest.xml")

#删除
for country in root.findall('country'):
    rank = int(country.find('rank').text)
    if rank >50:
        root.remove(country)
tree.write('output.xml')




